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8632324 Optimized helix angle rotors for roots-style supercharger  
A Roots-type blower has first and second meshed, lobed rotors disposed in first and second chambers of a housing. Each lobe has first and second axially facing end surfaces defining a twist angle...
8632321 Fully submerged integrated electric oil pump  
A submersible electric pump includes a housing adapted to be submerged within a fluid to be pumped having apertures extending therethrough. An electric motor stator is positioned within the housing...
8632323 Internal gear pump rotor, and internal gear pump using the rotor  
A gear pump rotor is provided including a combination of an inner rotor and an outer rotor whose numbers of teeth are different by one, and the discharge amount of the pump is increased by an...
8628306 Helium enclosed compressor  
Helium enclosed compressor. A compressor and a motor section with stator having coil ends and a rotor, are housed within an enclosed vessel partitioned into discharge and motor chambers by a frame....
8628312 Compressor including anti-rotation washer and method of assembly  
A compressor may include a shell, a housing fixed within the shell, first and second scroll members disposed within the shell, a sleeve guide, a fastener, and a washer. The first scroll member may...
8628313 Scroll fluid machine with a coating layer  
A scroll fluid machine that is capable of preventing a power loss and enhancing the degree of hermeticity of compression chambers. A plurality of outer peripheral projections are formed on an outer...
8628314 Scroll compressor including a communication section between the suction chamber and the supply flow path  
A scroll compressor includes a housing; a fixed scroll fixed in the housing; an orbiting scroll that has an orbiting end plate on which a spiral orbiting wall is provided upright and that is...
8628315 Fluid machine  
Intended is to provide a fluid machine that can prevent wear of a rotation preventing pin. The fluid machine includes a housing, a fixed scroll fixed with respect to the housing, a turning scroll...
8628316 Compressor having capacity modulation system  
A compressor includes a housing, a first scroll member, a second scroll member and a modulation assembly. The first scroll member includes a first end plate having a discharge passage, a first...
8628317 Vacuum pump with an axial oil feed conduit  
A vacuum pump (10) suitable for mounting at a lower region of an engine such as in the oil sump of an engine. The vacuum pump (10) includes a casing (12) having a cavity (14) containing a movable...
8622717 High-performance oil pump  
A high-performance oil pump for pumping oil in an internal combustion engine that eliminates or greatly reduces cavitation in the oil pump, thereby increasing the efficiency and performance of the...
8622724 Scroll pump with isolation barrier  
Scroll pumping apparatus includes a first scroll element and a second scroll element; a drive mechanism operatively coupled to the second scroll element for producing orbiting motion of the second...
8622689 Rotor drive mechanism and pump apparatus  
A rotor drive mechanism and pump apparatus according to the present invention may cause an external screw type rotor of a uniaxial eccentric screw pump to rotate and carry out a revolution...
8622723 Scroll compressor  
A scroll compressor includes first and second scroll members housed in a casing. The first scroll member has a fluid inlet and a first through hole spaced from the fluid inlet. A fluid introducing...
8622725 Mechanical compression ratio changing screw compressor  
A screw compressor includes a pair of rotors housed in a rotor chamber. A gas sucked from an intake channel is compressed by the screw rotors and discharged from a discharge channel. A columnar...
8616176 Rotary internal combustion engine  
A rotary engine includes a compressor assembly and two power assemblies that receive compressed air from the compressor assembly. Each assembly includes at least two intermeshing rotors. The rotors...
8616856 Air compressor of water injection type  
In a water injection air compressor including a compressor main body for compressing air, a water-feed line for feeding water to an actuation chamber in the compressor main body, an air release...
8613610 Variable displacement pump  
A variable displacement pump includes a pump structural member configured to change volumes of a plurality of working chambers by rotation of a rotor, so as to introduce oil through an inlet port...
8613609 Bi-metal pump gear  
A pump gear is provided. The pump gear includes a first shaft portion having a first end and a second end with an integral gear portion formed therebetween. The first shaft portion is made from a...
8613270 Rotary energy converter with retractable barrier  
A rotary internal combustion engine includes an outer housing and an inner housing and an enclosure defined therebetween. At least one of the outer and inner housings is rotatable relative to the...
8613269 Internal combustion engine with direct air injection  
An internal combustion engine is provided. The engine comprises at least one combustion chamber. The engine is suitable for various types of fuel. The engine, depending on fuel type, may have at...
8613608 Progressive cavity pump having an inner rotor, an outer rotor, and transition end piece  
An outer rotor of a progressive cavity pump includes at least one inner helical rotor with Z external thread starts and at least one adapted outer rotor with a helical cavity with Z+1 internal...
8608465 Positive-displacement rotary pump having a positive-displacement auxiliary pumping system  
Positive-displacement auxiliary pumping systems for use in pump apparatus of different configurations are disclosed. The positive-displacement auxiliary pumping systems are included in...
8607846 Mold and molding manufacturing method  
A mold includes a first groove part and a second groove part. The first groove part extends with a constant length or a constant width from a center part to an outer circumferential part of the...
8602758 Indexed positive displacement rotary motion device  
An indexing system for a rotor assembly where the indexing system can regulate the rotational location of drive rotors that are configured to rotate about a shaft in one form.
8602756 Scroll type compressor having an elastic member to suppress noise and reduce variations  
Provided is a scroll type compressor which reduces variations in the pressing load of a rotating scroll on a fixed scroll, reduces the impact at the start of the compressor and suppresses noises,...
8602749 Variable displacement vane pump  
A variable displacement vane pump includes, but is not limited to inlet and outlet ports in a pump body, a drive shaft rotatably mounted in the pump body, a rotor driven by the drive shaft and...
8602324 Liquid sprayer  
A motion-powered liquid sprayer that can increase the number of rotations of the pump relative to each rotation of the wheel or axle is provided. The sprayer can include a gearing assembly that...
8602755 Rotary compressor with improved suction portion location  
A rotary compressor is provided. The rotary compressor may include a plurality of cylinders each having a suction port formed such that an intersection of a center line of the suction port and a...
8602759 Screw-type vacuum pump having overpressure openings  
A screw vacuum pump, in particular for compression against atmospheric pressure, comprises a pump housing defining a suction chamber. Two meshing screw rotors are arranged in the suction chamber....
8602760 Vane compressor  
A vane compressor according to the present invention, including a cylinder which is approximately cylindrical and whose both ends located in an axial direction are open, a cylinder head and a frame...
8602757 Rotary device  
A device includes a ring having a tubular interior surface centred about an axis. The surface includes a plurality of axially extending, inwardly-projecting ridges. On opposite sides of each ridge...
8602748 Pumping system  
A pumping system having a pump, such as a variable-displacement vane pump or a gear pump. The pump in turn has hydraulic pressure-control dissipating devices for imparting to the oil in a first...
8597002 Hydraulic machine with vane retaining mechanism  
A hydraulic pump or motor includes a body having a chamber and a rotor rotatably mounted within the chamber. The chamber and rotor are shaped to define one or more rise regions, fall regions, major...
8597006 Apex seal for rotary internal combustion engine  
In one aspect, there is described a rotor of a Wankel engine including a plurality of apex seal members each biased by a respective spring, each spring including an axial action portion and a...
8597005 Compressor incorporated with oil separator  
A compressor incorporated with an oil separator having a separation chamber, which is placed adjacent to a discharge chamber, has a space formed in the entire inside of the separation chamber,...
8597004 Scroll type compressor having an intercommunication path in which a pin member is inserted  
A scroll type compressor including a fixed scroll, a movable scroll engaged with the fixed scroll and a hermetically sealed container, one of the fixed scroll and the movable scroll including an...
8597003 Direct control variable displacement vane pump  
A lubrication system for a power transmission device includes a variable displacement vane pump including a moveable control ring for varying the displacement of the pump. A linear actuator...
8597007 Screw pump rotor and method of reducing slip flow  
A pump rotor for a screw pump includes a shaft, a first set of threads disposed on a portion of an outer surface of the shaft, at least one thread of the first set of threads including a groove...
8591210 Scroll compressor having adjustable spacers  
A scroll compressor 40 comprises: housing 12, orbiting scroll 26 and fixed scroll 41. The drive shaft 14 has an eccentric shaft portion 18 so that rotation of the eccentric shaft portion imparts an...
8590322 Oil separator and refrigerant compressor having the same  
An oil separator includes a separation part and an oil storage part. The separation part includes a separation cylinder, an inner cylinder disposed in the separation cylinder and an inlet pipe...
8585385 Refrigerant compressor and refrigerating cycle device  
A refrigerant compressor includes a first layer (24) composed of a single layer of chromium, a second layer (25) composed of an alloy layer of chromium and tungsten carbide, a third layer (26)...
8585384 Rotary pump including inner rotor and outer rotor having different axial size of an axial clearance  
A housing includes a pump chamber, which rotatably receives an inner rotor and an outer rotor that define a pressure chamber therebetween. An inlet port of the housing is communicated with the...
8585383 Scroll fluid machine  
In a scroll fluid machine where an orbiting scroll fixed to a pivot shaft eccentrically revolves, a fixed portion is provided on a bottom of a casing, and a swing column is provided between the...
8585382 Compressor having capacity modulation assembly  
A compressor includes a shell assembly, first and second scroll members and a capacity modulation assembly. The first and second scroll members form a series of pockets. A first modulation port...
8585376 Water-injection type scroll air compressor  
Disclosed is a water-injection type scroll air compressor whose pre-stopping operation time for drying can be reduced while enhancing compressor efficiency. The compressor body 1 includes a water...
8585381 Scroll type compressor having an intercommunication path in which a pin member is inserted  
A scroll type compressor including a fixed scroll, a movable scroll engaged with the fixed scroll, and a hermetically sealed container in which the fixed scroll and the movable scroll are mounted....
8579613 Vane pump and vapor leakage check system having the same  
A vane pump includes a housing defining a pump chamber; a rotor rotatably arranged in the pump chamber; and a motor to rotate the rotor. An imaginary plane is defined to bisect the pump chamber in...
8579614 Scroll compressor with three discharge valves, and discharge pressure tap to back pressure chamber  
A scroll compressor has a housing enclosing a compressor pump unit which includes an orbiting scroll member and a non-orbiting scroll member. Each of the orbiting and non-orbiting scroll members...
8579618 Internal gear pump with optimized noise behaviour  
An internal gear pump (1) is proposed for conveying a fluid by a driven pump gear wheel (3) and a ring gear (4), as a gear pair residing in an enclosure, which are, for instance, meshing and hereby...